Redox transformations in the surface layer of complex RBa2Cu3Oy oxides (R = Nd, Ho, Y) and their catalytic properties in CO oxidation

Initial stages of redox transformations in the surface layers of complex RB a2Cu3Oy oxides (R = Nd, Ho, Y) in the course of their interaction with CO a nd O-2 are studied under non-steady-state conditions by a pulse microcataly tic method. It is shown that the interaction of RBa2Cu3Oy phases (R = Y, Ho , Nd) with CO results in the removal of a weakly bound oxygen and in the fo rmation of a surface layer of RBa2Cu3Oy, reduction products. It is found th at RBa2Cu3Oy oxides retain their ability to be oxidized after reductive tre atment. Oxygen from the bulk phases of multicomponent RBa2Cu3Oy oxides can take part in the catalytic oxidation of CO.